/Engine/Source/Editor/Kismet/Public/BlueprintNamespaceUtilities.h
Analyzes a property value to determine explicitly-assigned namespace identifiers from any object references, or otherwise returns the default namespace for each occurrence (default).
static void GetPropertyValueNamespaces ( const [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * InProperty, const void * InContainer, [TSet](API\Runtime\Core\Containers\TSet)< [FString](API\Runtime\Core\Containers\FString) > & OutNamespaces )